MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged insert design. These environmentally sealed connectors are built to withstand extreme conditions, operating reliably in temperatures ranging from -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatile installation options. With 9 shell sizes and 52 insert arrangements available, these connectors accommodate various contact configurations, including M39029 rear release crimp contacts. Constructed with high strength aluminum shells and offering multiple plating options such as gold, electroless nickel, and anodized aluminum, they ensure durability and corrosion resistance. RoHS compliant finishes are also available. Ideal for military and industrial applications, these MIL-DTL-38999 I connectors deliver reliable performance in demanding environments.